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RADIO WAVE ARRIVAL ANGLE DETECTING DEVICE AND RADIO WAVE ARRIVAL ANGLE DETECTING METHOD
RADIO WAVE ARRIVAL ANGLE DETECTING DEVICE AND RADIO WAVE ARRIVAL ANGLE DETECTING METHOD
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机译:无线电波到达角检测装置及无线电波到达角检测方法
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摘要
A radio wave arrival angle detecting device includes: a first receiver antenna; a second receiver antenna that is located apart from the first receiver antenna by a distance less than the wavelength of the signal wave; an oscillator that outputs an oscillation wave at the same frequency as the signal wave; a first multiplier that outputs a first mixture wave by multiplying the first signal wave by the oscillation wave; a first filter that extracts a first DC component of the first mixture wave; a second multiplier that outputs a second mixture wave by multiplying the second signal wave by the oscillation wave; a second filter that extracts a second DC component of the second mixture wave; and an arrival angle calculator that calculates a phase difference between the first signal wave and the second signal wave and that calculates an arrival angle of the signal wave.
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